What is chemical composition of SA588 Gr A weathering steel sheets

Nov 17, 2025 Zanechajte správu

SA588 Gr A steel plate among our core products. As a trusted supplier of ASME SA588 GrA steel, we guarantee the delivery of high-quality, certified SA588 Grade A plates that meet international standards.

 

SA588 Gr A steel plate

 

Steel Grade: ASME SA588 GrA

Steel Standard: ASME SA588 / SA588M

Thickness: 2 mm – 450 mm

Width: 1000 mm – 4200 mm

Length: 3000 mm – 18,000 mm

 

V
SA588 Gr A 0.19 0.80–1.25 0.04 0.05 0.30–0.65 0.40 0.40–0.65 0.25–0.55 0.02–0.10

 

<100 mm 485 345 21
>=100–125 mm 460 315 21
>125–200 mm 435 290 21
485 345 21

 

Gnee SA588 Gr A steel plates are widely used in:

 

Industrial Equipment: Air preheaters and economizers, where temperatures reach up to 450℃ and steel requires both high strength and corrosion resistance.

 

Transportation: Railway carriages and shipping containers, benefiting from tensile strength >=485 MPa and yield strength >=345 MPa, ensuring safety and durability under heavy loads.

 

Infrastructure & Construction: Bridges, high-rise buildings, and structural frameworks, where the steel's elongation >=21% provides

flexibility against dynamic loads and vibrations.

 

Other Structural Uses: Heavy machinery, industrial plants, and engineering projects demanding long-term atmospheric corrosion resistance with maintenance intervals extended by up to 50% compared to ordinary carbon steel.

 

Why Choose Gnee SA588 GrA Steel Plates:

Certified Quality: Fully compliant with ASME SA588/SA588M standards, verified by chemical composition and mechanical testing reports.

 

High Strength & Durability: Tensile strength up to 485 MPa, yield strength up to 345 MPa, supporting heavy structural loads and minimizing deformation.

 

Corrosion & Weather Resistance: Advanced low-alloy composition forms a protective oxide layer, reducing corrosion rate to <0.03 mm/year in outdoor conditions, significantly lowering maintenance costs.

 

Versatile Treatments: Supplied in hot-rolled, cold-rolled, normalized, quenched & tempered, or TMCP processed forms, allowing customization for specific project requirements.

 

Advanced Manufacturing: Produced with precision rolling and modern heat treatment, ensuring dimensional tolerances within ±2 mm and consistent mechanical properties across large plates.

 

 

info-503-469